var cache = {};

module.exports = function tmpl(str, data) {
    // Figure out if we're getting a template, or if we need to
    // load the template - and be sure to cache the result.
    // eslint-disable-next-line no-negated-condition
    var fn = !(/\W/).test(str) ?
        cache[str] = cache[str] ||
        tmpl(document.getElementById(str).innerHTML) :

        // Generate a reusable function that will serve as a template
        // generator (and which will be cached).
        // eslint-disable-next-line
        new Function("obj",
        'var p=[],print=function (){p.push.apply(p,arguments);};' +

        // Introduce the data as local variables using with(){}
        "with(obj){p.push('" +

        // Convert the template into pure JavaScript
        str
            .replace(/[\r\t\n]/g, ' ')
            .split('<%').join('\t')
            .replace(/((^|%>)[^\t]*)'/g, '$1\r')
            .replace(/\t=(.*?)%>/g, "',$1,'")
            .split('\t').join("');")
            .split('%>').join("p.push('")
            .split('\r').join("\\'") +
        "');}return p.join('');");

    // Provide some basic currying to the user
    return data ? fn(data) : fn;
};
